What is popcycle.dat?
The popcycle.dat file controls how many vehicles and pedestrians appear in each area of Los Santos throughout the day-night cycle. It defines population density schedules for every zone, making streets busier during rush hours and emptier at night.
File location: common.rpf/data/
File Structure
| Section | Controls | Values |
|---|---|---|
| Zone Definition | Geographic area boundaries | Zone name + coordinates |
| Time Slots | 6 time periods per zone (4-hour blocks) | 00-04, 04-08, 08-12, 12-16, 16-20, 20-24 |
| Vehicle Density | Number of spawned vehicles per time slot | 0-255 (higher = more traffic) |
| Ped Density | Number of spawned pedestrians per time slot | 0-255 (higher = more crowded) |
| Ped Groups | Which ped models appear in each zone | Group IDs from popgroups.ymt
|
How to Edit popcycle.dat
- Extract
popcycle.datfromcommon.rpf/data/using OpenIV - Open with any text editor (it's a plain text file)
- Find the zone you want to modify (e.g.,
DOWNTOWN,VINEWOOD) - Adjust density values for each time slot
- Save and place in
mods/common.rpf/data/
Common Modifications
- Empty streets: Set all vehicle and ped values to 0 — useful for racing mods or filming
- Maximum chaos: Set all values to 255 — crowded streets everywhere (may affect performance)
- Realistic rush hour: High values for 08-12 and 16-20, low for nighttime
- Zombie apocalypse: Zero vehicles, high ped density with custom ped groups
Related Files
-
popgroups.ymt— defines which ped models belong to each group -
vehiclemodelsets.meta— controls which vehicle models appear in traffic -
dispatch.meta— manages emergency vehicle and police spawning
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